Pictures Of Dirt Bike Birthday Cakes I Went Bmx And Dirt Bike Riding And Now It Hurts To Walk.See For Pictures.Whats Wrong With Me?

I went bmx and dirt bike riding and now it hurts to walk.See for pictures.Whats wrong with me? - pictures of dirt bike birthday cakes

My knee is hurt and it hurts to walk my left leg.
What? It seems beaten, but it is purple, the color red.
Heres a picture:
http://i252.photobucket.com/albums/hh12/ ...
What do you think is going on and what to do
limpping so I do not go to school tommarrow.
Thank you.